﻿#region license
// Copyright (c) 2007 Rodrigo B. de Oliveira (rbo@acm.org)
// All rights reserved.
// 
// Redistribution and use in source and binary forms, with or without modification,
// are permitted provided that the following conditions are met:
// 
//     * Redistributions of source code must retain the above copyright notice,
//     this list of conditions and the following disclaimer.
//     * Redistributions in binary form must reproduce the above copyright notice,
//     this list of conditions and the following disclaimer in the documentation
//     and/or other materials provided with the distribution.
//     * Neither the name of Rodrigo B. de Oliveira nor the names of its
//     contributors may be used to endorse or promote products derived from this
//     software without specific prior written permission.
// 
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
// ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
// WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
// DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE
// FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
// DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
// SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
// CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
// OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
// THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

# Taken and modified from ConcurrentBoo

# This file is part of Grawlix.
# 
# Grawlix is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as
# published by the Free Software Foundation, either version 3 of
# the License, or (at your option) any later version.
# 
# Grawlix is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
# 
# You should have received a copy of the GNU General Public
# License along with Grawlix.  If not, see
# <http://www.gnu.org/licenses/>.
#endregion

"""Execute in a thread's message loop."""

namespace ConcurrentBoo.Executors
#import ConcurrentBoo.Primitive
import System
import System.Threading
import System.Windows.Forms as SWF

transient class MessageLoopExecutor(ThreadedExecutor):
"""
Executes any actions in a thread with its own message loop. Good
for components with thread affinity that also need a message loop
(STA COM components, for instance).
"""
	
	def constructor():
	"""Construct the executor, using a single-threaded apartment."""
		self(ApartmentState.STA)
		
	def constructor(apartmentState as ApartmentState):
	"""
	Construct the executor.
	Param apartmentState: The apartmentState of the thread to create.
	"""
		_apartmentState = apartmentState
		
	override protected def CreateThread():
	"""
	Create the thread.
	Returns: The new thread.
	"""
		thread = super()
		thread.SetApartmentState(_apartmentState)
		return thread
	
	override protected def ExecutionLoop():
	"""The main loop of the thread."""
		while true:
#			message as Action
#			if Channel.TryDequeue(message):	
#				if not ProcessMessage(message):
#					break
			SWF.Application.DoEvents()
	
	[getter(ApartmentState, Protected: true)]
	private _apartmentState as ApartmentState
	"""Apartment state of the thread."""
	
